I remember this timetable, it was around 1988 and featured direct trains from the Camberley line to London off peak for around 3 years.
Pattern out of Waterloo was IIRC:
xx00 Clapham, Richmond then fast to Ascot then all to Reading
xx03 Clapham, Richmond, Twickenham, Feltham, Staines, all (?) to Guildford via Camberley
xx33 Clapham, Richmond, Feltham, Staines, all (?) to Reading
There was also interestingly a Guildford-Ascot-Reading which combined with the other 2 to form 20 minute interval Ascot to Reading.
Definitely one of the more interesting timetables on this line in my memory. Also in those days the "outer" peak workings were as frequent as every 10 minutes out of Waterloo (00, 10, 20, 30, 40, 50) alternating between Reading and the Camberley line.